Furnace-grate.



N9. 879,908, PATENTED; FEB. 25, 1908.

W. 0. ROOT. FURNACE GRATE.

APPLICATION PfLBD JULY 28. 1006.

J FEFFFFFFFFFFFEFFF UNITED STATES PATENT OFFICE.

WESLEY O. ROOT, OE CHICAGO, ILLINOIS.

FURNACE-GRATE.

Specification of Letters, Patent.

Patented Feb. 25, 1908.

Application filed July 28 1906. Serial No. 328253- To all whom it may concern:

Be it known that I, WESLEY 0. R001, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnace-Grates, of which the following is a specification.

This invention relates to furnace grates and. more particularly to the travelin chain able.

' view of the grate.

A further object of the invention is to make each grate bar as a Whole readily removable f'rom the ate.

The invention a so relates to the other improvements in furnace grates hereinafter-set orth. 4

In the-accompanying drawings, Figure 1 is a fragmental side elevation of a furnace grate embodying the features of my invention. Fi 2' is a transverse vertical section through said grate. Fig. 3 is a fragmental top plan Fi 4 is a detail perspective view of one of t e parts by means of which the grate bars are attached to the traveling chains. view of one of the grate-bar sections. Fig. 6 is a detail perspective View of two links of one of" thechains comprised in the ate. Fig. 7

isa transverse section throng one of the grate bars.

I have herein illustrated my invention as applied to a traveling chain grate, andhave omitted from the drawings the furnace walls and other parts usual in furnaces. The grate comprises two endless chains 1 supported upon sprocket wheels 2 fixed upon shafts 3, one of which shafts is arranged to be rotated by any suitable or convenient means (not herein shown). Each of ,the chains 1 is made up of links 4 and '5 connected by means of pivot pins v6, said pins being held in place bfy cotters 7 It will thus be seen that the 0 sins may be taken apart at any point in their lengths for the removal of a broken or injured link and the substitution of a new link. To each of these links is detachably secured a grate bar 8, said grate bar compris Fig. 5 is a perspective ing two channel bars 9 spaced apart and secured together in parallel position by means ofshouldered rivets 1-0. (Fig. 3).

The edges of the channel bars 9 at one side are notched, as at 11, tofit over the chains 1. The channel bars 9 are arranged with their flanged. sides facing each other, and between theflanges12 at one side of the grate bar formed by said channel. bars is secured a plurality of grate-bar sections 13', each of said sections comprising a securing shank 14 having grooves 15 at its opposite sides to receive the flanges 12 of the channel bars 9. Each grate-bansection 13 further comprises two Wings 16, each located slightly to one side of the longitudinal central line of the section and on opposite sides of said line. In its opposite sideseach grate-bar section has recesses 17, and in its upper surface is formed a transverse groove 18. The grate-bar sections 13 are put in place upon the channel bars 9 by sliding said sections onto the flanges 12 from either end of said channel bars. By referring to Fig. 3, it will be seen that when the grate-bar sections 13 are assembled upon the channel bars 9, the wings 16 intermesh loosely with the similar wings of the sections 13 of adjacent grate-bars. The spaces between the adjacent wings 16, the recesses 1'7 and the grooves 18 form air spaces for the passage of air to the fire, but said spaces are sufficiently small to prevent any considerable quantity of fuel from falling through the grate. As the grate-bar 8 consists substantially of the two channel bars 9 spaced a art, air is permitted to circulate freely t rough said grate bar to support combustion and to prevent the grate barfrom becoming unduly heated. It will be seen that the two longitudinal halves of each grate-bar section are similar, thus permitting of lacing the grate-bar section-upon the channe bars 9 with either side towardsaid channel bars.

The means for securing the grate bars 8 to the chains 1 comprises blocks 19 having grooves 20 in their opposite sides to receive the flanges 21 of the channel bars 9. Each block 19 has a stud 22-at one end adapted to enter an opening 23 formed in each of the links 4 and 5 ofthe chains 1. In the portion of the block 19 lying between the channel bars 9 is formed an elongated opening 24 adapted to receive a bolt 25 extending through registering square openings 26 in said channel bars (Fig. 7). The bolt 25 except at the threaded portion is square in cross-section to prevent its rotation when the nut 27 is turned uponsaid threaded end. At each side of the block 19 near the stud 22 is a lug 28 for a purpose to appear hereinafter.

In use, when a grate-bar section 13 has become injured by reason of the intense heat of the furnace or from any other cause, said section may be removed from the gratebar of which it is a part when said grate-bar, in the travel of the grate, arrives at the outer side of one of the sprocket wheels 2.

At suchtime the radial position of 7 the grate bar with relation to the sprocket wheel separates the grate-bar sections 13 of said grate bar from the sections 13 of the adjacent grate-bars, and permits of sliding the damaged grate-section and the sections to one side of said damaged section toward one end of the grate bar until the injured section can be removed. A. new section is then substituted for the damaged one and the other sections replaced. Should it be desirable to remove the entire grate bar, the

' nuts 27 are slaokened until the blocks 19 by means of which the grate bar is attached to the chains 1 can be slld in op osite directions toward the end of the grate liar to withdraw the studs 22 from the openings 23. The blocks 19 may be so slid by means of a pinchbar or othersuitable implement inserted beneath the lugs 28' and fulcrumed u on the ad- "acent link of the chain. When t 1e studs 22 ave been separated from the chains 1 the grate-bar 8 may be lifted bodily from the chainsl. In replacing the grate-bar the bar is fitted on the chains, the blocks 19 moved inward until the studs 22 enter the openings 23, and the nuts 27 tightened to hold said blocks in engagement with the chains. It is obvious that various changes in the construction and arrangement of the parts of the present embodiment may be made without de arting from the spirit of the invention. i, therefore, desire not to limit myself to the precise details herein set forth.

T I claim as my inventionu 1. A grate bar comprising two bars; means for securing said bars together in parallel position and spaced apart, said bars having flanges at their lower edges; means adapted to slidably engage said flanges for securing the grate bar in place in the grate; and means for releasably clamping said securing means and said grate bartogether.

2. A grate bar comprising two bars; shouldered rivets for securing said bars together inparallel position and for spacing them apart, said bars having flanges attheir lower edges; means adaptedto slidably engage said flanges for securing the grate bar lace in the grate; and means for releasl yclamping said securing means and said grate bar together.

two b 00 3. A grate bar comprising two channel bars, means engaging t e flanges at one side of said bars for securing the grate bar in place in the grate, means for releasably clam ing said engaging means and said channel ars together; and members forming the grate surface, and provided with shanks ada ted means for releasably securing said blocks to 'saldgratebars.

5. In a grate, in combination, two chains" havin o enings therein; a grate bar; and adapted to be movably secured tofsaid grate bar, said blocks having studs thereon adapted to lie'in said openings.

, 6. in a grate, in combination, twochains havin openings therein; a grate bar; and two blocks adapted to be movably secured to said grate bar, said blocks having 0 po- 'sitely extending studs thereon adapter to liein-saidopenings, said studs entering said chains from opposite sides of said chains.

7. In a grate, in combination, two chains having openings therein; a grate bar; two blocks having studs thereon adapted to lie in the openings in said chains, said blocks having e ongated openings extending therethrough; and a bolt extending through said grate bar and the elongated opening in each of said blocks. i 8. In a grate, in combination, two chai ns; a grate bar comprising two bars having flanges thereon; blocks having grooves there'- in adapted to receive said flanges, said blocks being adapted to engage said chains; and means for securing said blocks with relation to said grate bar.

9. In a grate, in combination, two chains; a grate bar comprising two bars having flanges thereon; two blocks ada ted to lie between said bars, said bloc s having grooves in their sides to receive said flanges; a bolt extending through said bars and each of said blocks; and means for attaching said blocks to said chains.

10. In a grate, in combination, two chains having openings therein; a grate bar com- WESLEY o. ROOT.

Witnesses: L. L. MILLER GEORGE L. .OHINDAHL. 

